Perforated Bowel secondary to Diverticulitis - Nursing Case Study
Pathophysiology
• Primary mechanism: Diverticulitis occurs when diverticula, small pouches in the colon wall, become inflamed due to fecal matter obstruction. This inflammation can lead to increased pressure and weakening of the bowel wall.
• Secondary mechanism: Persistent inflammation and pressure can cause the diverticula to rupture, resulting in a perforation. This breach allows intestinal contents, including bacteria and waste, to leak into the abdominal cavity.
• Key complication: The perforation can lead to peritonitis, a serious infection of the peritoneum, which may progress to sepsis if not promptly treated, posing significant risk to patient health.
Patient Profile
Demographics:
56-year-old male, office manager
History:
• Key past medical history: History of diverticulitis, hypertension, and type 2 diabetes
• Current medications: Metformin, lisinopril, atorvastatin
• Allergies: Penicillin
Current Presentation:
• Chief complaint: Severe abdominal pain
• Key symptoms: Fever, nausea, vomiting, abdominal distension, and tenderness
• Vital signs: Temperature 101.3°F, heart rate 118 bpm, blood pressure 94/58 mmHg, respiratory rate 22 breaths per minute, oxygen saturation 94% on room air
Section 1
Change in Patient Status:
As the medical team continued to monitor the patient, there was a notable change in his status. The patient's abdominal distension and tenderness worsened, and his pain became more generalized, indicating a potential progression of peritonitis. His vital signs also showed significant changes: his heart rate increased to 128 bpm, and his blood pressure dropped further to 88/54 mmHg, indicating potential hemodynamic instability and suggesting the onset of septic shock. Despite oxygen therapy, his oxygen saturation decreased to 91%, and his respiratory rate increased to 26 breaths per minute, pointing towards respiratory compromise likely due to increasing abdominal pressure and systemic inflammatory response.
These clinical changes prompted the team to reassess his condition urgently. Blood laboratory results revealed a white blood cell count of 20,000 cells/mcL, indicating a significant leukocytosis consistent with infection. Additionally, blood lactate levels were elevated at 4.5 mmol/L, further supporting the suspicion of sepsis. A follow-up CT scan of the abdomen confirmed the presence of free air under the diaphragm, consistent with bowel perforation, and showed diffuse fluid collection, suggesting widespread peritoneal contamination.
In response to these findings, the interdisciplinary team, including surgical and intensive care specialists, was consulted to discuss potential interventions. The patient was started on broad-spectrum intravenous antibiotics and aggressive fluid resuscitation to manage sepsis while preparing for potential surgical intervention to repair the perforation. The team prioritized continuous monitoring of vital signs and urine output to assess the effectiveness of the interventions and plan the next steps in the patient's management. The focus remained on stabilizing the patient's hemodynamics and addressing the source of infection to prevent further deterioration.
Section 2
Response to Interventions:
Despite the initiation of broad-spectrum antibiotics and aggressive fluid resuscitation, the patient's condition continued to pose significant challenges. Over the next few hours, his heart rate remained elevated at 130 bpm, and his blood pressure fluctuated but remained low, hovering around 92/56 mmHg, suggesting ongoing hemodynamic instability. The patient became increasingly lethargic, which raised concerns about adequate cerebral perfusion and prompted a neuro assessment to ensure there were no further complications such as encephalopathy. The team noted that his urine output was minimal, with less than 20 mL/hour, indicating potential acute kidney injury due to persistent hypoperfusion.
Further laboratory evaluations showed a continued rise in white blood cell count to 24,000 cells/mcL, and the metabolic panel indicated worsening acidosis with a bicarbonate level of 18 mEq/L and a blood pH of 7.28. These findings underscored the severity of the systemic inflammatory response and the need for more aggressive intervention. Despite the ongoing efforts, the elevated lactate levels persisted, now at 5.0 mmol/L, reinforcing the diagnosis of septic shock and indicating inadequate tissue perfusion and oxygenation.
Given the patient's deteriorating condition, the interdisciplinary team expedited preparations for surgical intervention to definitively address the perforation and peritoneal contamination. Preoperative measures included optimizing hemodynamics with vasopressors, specifically norepinephrine, to maintain a mean arterial pressure above 65 mmHg. The surgical team planned an exploratory laparotomy to repair the perforation and perform peritoneal lavage. The focus was on stabilizing the patient intraoperatively and postoperatively to prevent further complications such as multi-organ dysfunction syndrome (MODS). The team prepared for potential postoperative challenges, including the need for ventilatory support and continued intensive monitoring.
Section 3
As the surgical team proceeded with the exploratory laparotomy, the initial assessment findings upon opening the abdomen revealed extensive peritoneal contamination with purulent material and fecal matter, confirming the severity of the bowel perforation. The perforation was located in the sigmoid colon, consistent with the known history of diverticulitis. There was significant inflammation of the surrounding tissues, and initial cultures taken from the peritoneal fluid suggested polymicrobial infection, necessitating a potential adjustment in antimicrobial therapy post-surgery. Surgeons performed a primary repair of the perforation and extensive peritoneal lavage to mitigate further septic insult.
Postoperatively, the patient was transferred to the intensive care unit for close monitoring. Despite the successful surgical intervention, the patient remained in critical condition. His vital signs showed a persistent tachycardia with a heart rate of 125 bpm, and his blood pressure remained tenuous despite norepinephrine support, with readings around 95/60 mmHg. The lactate levels, although slightly reduced, were still elevated at 4.5 mmol/L, indicating ongoing issues with tissue perfusion. His respiratory status also became a concern post-surgery, as he required mechanical ventilation due to decreased respiratory effort and altered mental status, suggesting possible respiratory acidosis.
As the team continued to manage the patient, the primary focus shifted towards preventing the progression to multi-organ dysfunction syndrome (MODS). The patient’s renal function continued to be a concern, with urine output remaining low and serum creatinine levels rising to 2.5 mg/dL, confirming acute kidney injury. This necessitated the consideration of renal replacement therapy if urine output did not improve. The team emphasized the importance of careful fluid management, continued vasopressor support, and the potential need for dialysis, while also reassessing the antibiotic regimen based on culture sensitivities. The nursing staff played a crucial role in regular assessments and early detection of any further complications, ensuring the patient received comprehensive, multidisciplinary care.
Section 4
As the patient remained in the intensive care unit, the medical team closely monitored his condition for any changes that could indicate a shift in his clinical status. Despite aggressive management, including fluid resuscitation and vasopressor support, the patient developed a new complication: his abdominal distension increased, and he began exhibiting signs of abdominal compartment syndrome. This was evidenced by elevated intra-abdominal pressure measured at 22 mmHg, coupled with worsening oliguria, further drops in urine output, and increased ventilator pressures required to maintain adequate oxygenation. These findings suggested that the rising pressure within the abdominal cavity was compromising organ perfusion and respiratory function.
Given these developments, the surgical and critical care teams convened to reassess the management plan. The decision was made to perform a decompressive laparotomy to relieve the pressure and prevent further compromise to the patient’s already fragile state. Concurrently, a repeat analysis of the patient's blood cultures revealed the presence of an extended-spectrum beta-lactamase (ESBL) producing Klebsiella species, necessitating a modification in the antibiotic regimen to incorporate a carbapenem, which would more effectively target the resistant organism.
The nursing staff played a pivotal role in orchestrating the transition to this new treatment phase, ensuring the patient was prepared for the additional surgical intervention while maintaining vigilant monitoring for any signs of further deterioration. They also coordinated with pharmacy and infectious disease specialists to ensure timely administration of the adjusted antimicrobial therapy. This multi-faceted approach aimed to address both the mechanical and infectious threats to the patient’s recovery, underscoring the importance of integrated care and rapid response to evolving complications in critical scenarios.
Section 5
Following the decompressive laparotomy, the patient showed initial signs of stabilization. However, within 24 hours, the nursing team observed a change in the patient's status that warranted immediate attention. The patient became febrile, with a temperature spiking to 39.5°C (103.1°F), and tachycardic, with a heart rate climbing to 125 bpm. His blood pressure, which had been maintained with the help of vasopressors, began to fluctuate despite continuous support, raising concern for septic shock. Concurrently, the patient exhibited increased respiratory distress, with oxygen saturation levels dropping to 86% on the ventilator, requiring adjustments to both oxygen delivery and ventilatory settings to improve gas exchange.
Further laboratory tests revealed a marked increase in white blood cell count to 18,000/mm³, along with elevated lactate levels at 4.5 mmol/L, indicating a potential worsening of the infectious process despite the tailored antibiotic therapy. The combination of these findings suggested that the patient might be experiencing a systemic inflammatory response, possibly linked to ongoing intra-abdominal infection or a new source of sepsis. In response, the multidisciplinary team, including the infectious disease specialists, re-evaluated the current antimicrobial regimen, considering additional coverage for potential anaerobic organisms and reassessing the effectiveness of the carbapenem.
The nursing team continued to play a critical role in monitoring the patient's hemodynamic status and coordinating care efforts. They ensured that fluid resuscitation was optimized to support perfusion without exacerbating the risk of further abdominal compartment issues. Additionally, they facilitated the collection of repeat cultures and imaging studies to identify any new abscess formation or sources of infection. This comprehensive approach emphasized the importance of continuous reassessment and adaptation of the management plan to counteract emerging complications and guide the patient back toward stabilization.